Jones was in the ocean about 40 feet from the boat and had indicated to another diver that he was fine, when he suddenly went limp, Warren said.

He was pulled into the charter boat, where personnel began performing CPR on him, Warren said. A Monterey Fire Department boat arrived and transferred Jones to Community Hospital of the Monterey Peninsula.

CPR was performed on Jones for about an hour, but he was pronounced dead at the hospital, Warren said.

An autopsy by the coroner’s office will help determine the cause of his death, Warren said.

(Copyright 2013 by CBS San Francisco and Bay City News Service. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)